Clean EACV?

wow this thread had no replies at all? no help for this guy well too late now, but wait its never too late i need to find out what this is, what i means, its usage and where to find it. i was told this might be the problem to my slightly rough idle, as i said in another post that was made, its rough to me and smooth to others. i just feel the car shouldnt shake through the body i dont care how light the vibration is but its a legend. i recently did a tune up and it vibrates the same as b4. initially i thought doing the spark plugs would rectify the problem, they needed to be done anyway. (electrodes grounded out)